Benjamin Seymour Guinness

Benjamin Seymour Guinness (18 November 1868 – 15 December 1947), jure uxoris Prince di Mignano,[1] was an Anglo-American businessman, lawyer and railway magnate.

Based in New York, Guinness was a director of the New York Trust Company, Lackawanna Steel Company, Kansas City Southern Railway, Seaboard Air Line Railroad, Duquesne Light Company, and United Railroads of San Francisco.

Following her death in 1931, he remarried, in 1936, to Princess Maria Nunziante di Mignano, daughter and heiress of the Italian Duke of Mignano.

[4] As the husband of an Italian noblewoman, Guinness was awarded the life-title—considered titular—of Prince by King Umberto II of Italy on 22 May 1946.

Following his death in 1947, his widow and children were involved in a lengthy dispute over his estate.